Installation

Install the .NET Software Development Kit & Entity Framework Core tools:

sudo apt install dotnet-host-7.0

sudo apt install dotnet-sdk-7.0

Create new project

Create a new solution

dotnet new sln -o myProject

cd myProject

Inside your project, create a new classlib and xunit

dotnet new classlib -o Fun

dotnet new xunit -o Fun.Test

… Add them to your solution

dotnet sln add Fun && dotnet sln add Fun.Test

… Inside the test, make a reference to the classlib

dotnet add Fun.Test reference Fun

Run the test from the root of your project

dotnet test

Unit testing sample

Function example Fun/Class1.cs

namespace Fun;
public class Class1
{
  public string SayAnything() => "Hello World!";
}

Test example Fun.Test/UnitTest1.cs

namespace Fun.Test;
using Fun;

public class UnitTest1
{
    [Fact]
    public void Test1()
    {
      string class1 = new Class1().SayAnything();
      Assert.True(class1.Equals("Hello World!"), "Both strings should be equal");

    }
}

Assumed project structure

myProject/
├── myProject.sln
├── Fun
│   ├── Fun.csproj
│   └── Class1.cs
└── Fun.Test
    ├── Fun.Test.csproj
    ├── UnitTest1.cs
    └── Usings.cs